Q: Help Blue screen

You have a kernel panic

Does it work now?

If so then log the panic and lost it here

Mac OS X: How to log a kernel panic

- Try resetting the SMC and NVRAM/PRAM

Intel-based Macs: Resetting the System Management Controller (SMC)

About NVRAM and PRAM       

- Try starting in Safe Mode

OS X: What is Safe Boot, Safe Mode?

- Boot to Recovery and repair the startup disk

OS X: About OS X Recovery - Apple Support

- If it is repairable reinstall the OSX

How to reinstall OS X on your Mac - Apple Support

- If you do not have a backup use disk utility to restore the internal disk to an external disk so you can try to recover data.

Then format the startup disk and do a fresh install of OSX

Recovery is only for Lion and above. If you have Some Leopard then use an install DVD instead.

Make an appointment at the Genius Bar of an Apple store since it appears you have a hardware problem.

  Apple Retail Store - Genius Bar                              

Maybe this:

MacBook Pro (15-inch, Mid 2010) intermittent black screen or loss of video Quality Program has ended - Apple Support

http://www.apple.com/support/macbookpro-videoissues/